package cn.yunyichina.provider.pay.wechat.utils;

import cn.yunyichina.provider.framework.exception.CallException;
import cn.yunyichina.provider.iface.entity.ErrorCodeDefine;
import cn.yunyichina.provider.pay.wechat.entity.publicMessage.Article;
import cn.yunyichina.provider.pay.wechat.entity.publicMessage.NewsMessage;
import cn.yunyichina.provider.pay.wechat.entity.publicMessage.TextMessage;
import com.alibaba.fastjson.JSONObject;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.core.util.QuickWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.XppDriver;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Writer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 消息工具类
 */
public class MessageUtil {

	private static Logger logger = LoggerFactory.getLogger(MessageUtil.class);
	/**
	 * 返回消息类型：文本
	 */
	public static final String RESP_MESSAGE_TYPE_TEXT = "text";

	/**
	 * 返回消息类型：音乐
	 */
	public static final String RESP_MESSAGE_TYPE_MUSIC = "music";

	/**
	 * 返回消息类型：图文
	 */
	public static final String RESP_MESSAGE_TYPE_NEWS = "news";
	/**
	 * 返回消息类型：图片
	 */
	public static final String RESP_MESSAGE_TYPE_IMAGE = "image";

	/**
	 * 请求消息类型：文本
	 */
	public static final String REQ_MESSAGE_TYPE_TEXT = "text";

	/**
	 * 请求消息类型：图片
	 */
	public static final String REQ_MESSAGE_TYPE_IMAGE = "image";

	/**
	 * 请求消息类型：链接
	 */
	public static final String REQ_MESSAGE_TYPE_LINK = "link";

	/**
	 * 请求消息类型：地理位置
	 */
	public static final String REQ_MESSAGE_TYPE_LOCATION = "location";

	/**
	 * 请求消息类型：音频
	 */
	public static final String REQ_MESSAGE_TYPE_VOICE = "voice";

	/**
	 * 请求消息类型：推送
	 */
	public static final String REQ_MESSAGE_TYPE_EVENT = "event";

	/**
	 * 事件类型：subscribe(订阅)
	 */
	public static final String EVENT_TYPE_SUBSCRIBE = "subscribe";

	/**
	 * 事件类型：unsubscribe(取消订阅)
	 */
	public static final String EVENT_TYPE_UNSUBSCRIBE = "unsubscribe";

	/**
	 * 事件类型：CLICK(自定义菜单点击事件)
	 */
	public static final String EVENT_TYPE_CLICK = "CLICK";
	/**
	 * 事件类型：VIEW(自定义菜单点击事件)
	 */
	public static final String EVENT_TYPE_VIEW = "VIEW";


	/**
	 * 文本消息对象转换成xml
	 *
	 * @param textMessage
	 *            文本消息对象
	 * @return xml
	 */
	public static String textMessageToXml(TextMessage textMessage) {
		xstream.alias("xml", textMessage.getClass());
		return xstream.toXML(textMessage);
	}
//
//	/**
//	 * 音乐消息对象转换成xml
//	 *
//	 * @param musicMessage
//	 *            音乐消息对象
//	 * @return xml
//	 */
//	public static String musicMessageToXml(MusicMessage musicMessage) {
//		xstream.alias("xml", musicMessage.getClass());
//		return xstream.toXML(musicMessage);
//	}

	/**
	 * 图文消息对象转换成xml
	 * 
	 * @param newsMessage
	 *            图文消息对象
	 * @return xml
	 */
	public static String newsMessageToXml(NewsMessage newsMessage) {
		xstream.alias("xml", newsMessage.getClass());
		xstream.alias("item", new Article().getClass());
		return xstream.toXML(newsMessage);
	}

//	public static String imageMessageToXml(ImageMessage imageMessage) {
//		xstream.alias("xml", imageMessage.getClass());
//		return xstream.toXML(imageMessage);
//	}

	/**
	 * 扩展xstream，使其支持CDATA块
	 */
	private static XStream xstream = new XStream(new XppDriver() {
		public HierarchicalStreamWriter createWriter(Writer out) {
			return new PrettyPrintWriter(out) {
				// 对所有xml节点的转换都增加CDATA标记
				boolean cdata = true;

				@SuppressWarnings("unchecked")
				public void startNode(String name, Class clazz) {
					super.startNode(name, clazz);
				}

				protected void writeText(QuickWriter writer, String text) {
					if (cdata) {
						writer.write("<![CDATA[");
						writer.write(text);
						writer.write("]]>");
					} else {
						writer.write(text);
					}
				}
			};
		}
	});

	/**
	 * 解析并且给url的参数赋值,如http://abc.ed.com?order_no={{order_no}}
	 * @param url
	 * @param param 包含参数值的对象
	 * @return
	 */
	public static String parseUrl(String url,JSONObject param) {
		logger.info("parseUrl入参："+url);
		if (StringUtils.isBlank(url)) {
			return url;
		}
		if (url.indexOf("{{")> 0) {
			Pattern p = Pattern.compile("(?i)\\{\\{(\\s*[\\w_\\d]+\\s*)\\}\\}");
			Matcher m = p.matcher(url);
			StringBuffer sb = new StringBuffer();
			while (m.find()) {
				String fieldName = m.group(1).trim().toLowerCase();
				if (param.containsKey(fieldName)) {
					m.appendReplacement(sb, param.getString(fieldName));
				}
				else {
					logger.error(fieldName+"参数未传入值");
					//如果参数没有传入，返回空串，结果是模板点击失效
					throw new CallException(ErrorCodeDefine.MESSAGE_VALUE, fieldName+"参数未传入值");
				}
			}
			m.appendTail(sb);
			url = sb.toString();
		}
		logger.info("parseUrl后："+url);
		return url;
	}


}
